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Runs privately in your browser

Free Online Viewport Checker

Show actual viewport dimensions, display dimensions and device pixel ratio; update after resize. This interface works locally in your browser.

Your input stays on this device. Processing is bounded; regex runs in a worker with a two-second timeout.

Result



How to use Viewport Checker
Show actual viewport dimensions, display dimensions and device pixel ratio; update after resize. This interface works locally in your browser.
  1. Set Label.
  2. Run the tool, review the result and its stated limitations, then copy or download if needed.
Example & practical use
Show actual viewport dimensions, display dimensions and device pixel ratio; update after resize. This interface works locally in your browser. The example below demonstrates Label.
Example input:
{
  "label": "Current display"
}
Result: A generated result whose value varies on each run.
Features & result limitations
Show actual viewport dimensions, display dimensions and device pixel ratio; update after resize. This interface works locally in your browser.
Frequently asked questions
What inputs does Viewport Checker accept?
Label
How should I interpret the Viewport Checker result?
Show actual viewport dimensions, display dimensions and device pixel ratio; update after resize. This interface works locally in your browser.
Where does Viewport Checker process my data?
Inputs are processed locally in your browser. Submitted text is not sent to external services. A successful-run event increments an aggregate tool counter without your input.